Air-valve for pneumatic tires



.(No Model.) 2 Sheets-Sheet If W. E. BRADNBR.

AIR VALVE POR PNEUMATIG TIRES.

Patented May 19, 1896.

@jf im 2 .Sheets-Sheet 2 l(No Model.) I

' W. 11. 811111111811. V.11111 VALVE P011 811111111111110 8188s. No.880,188. Patented May 19, 1898.

llNiTED STATES PATENT OFFICE.

VILLIAM E. BRADNER, OF NEVARK, NEV JERSEY.

AIR-VALVE FOR PNEUMATIC TIRES.

SPECIFICATION forming part of Letters Patent No. 560,188, elated May 19,1896.

Application filed July 27, 1895. Serial No. 557,313. (No model.)

To @ZZ whom, it may concern.-

Be it known that l, VILLIAM E. BRADNEP., a citizen of the United States,residing at Newark, in the county of Essex and State of New llersey,have invented certain new and useful Improvements in Air-Valves forPneumatic Tires; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersof reference marked thereon, which form a part of this specication.

My invention relates to an improvement in the air-valves for pneumatictires, making these simpler in construction and securing a greaterefficiency of the valve properthat is, in making it more air-tight thanany of the hitherto-known constructions and making the said valve lesscostly in its manufacture. The mechanical means utilized by me in sodoing l shall now proceed to illustrate and describe, reference beinghad to the accompanying drawings, where like letters of referenceindicate corresponding parts in the diiierent views, and finallyembodying my improvements in the hereunto added claims.

ln Figure 1 is shown an enlarged sectional view of the valve, the piecesbeing separated from each other for the sake of showing the constructionmore distinctly, Fig. lA being the cap, Fig. 1B the center part, andFig. l" the bottom part. Fig. 2 is aview of the middle piece B,containing the inflating-valve proper, relative to which is myinvention, showing my improved spring closing the valve on one sideonly. Fig. 3 is an end view of the middle piece B, showing how thespring lies in a groove cut out in the end of the part B9. Fig. l is atop view of the middle piece in the position it is shown in Fig. l. Fig.5 is a view of the middle piece B with my improved curved spring closingbot-h air apertures. Fig. G is an end view of Fig. 5. Fig. is a view ofthe middle piece B with my curved spring closing only one air-aperture-Fig. 8 is an end view of Fig. '7. Fig. 9 is a view of the middle pieceB, showing it with two flat surfaces, the outlets coming through theseand the springs clasping said surfaces; and Fig. lO is an end view ofFig. 9.

In Fig. l A indicates the cap, screw-cut internally and having anair-tight disk A, made of suitable material, at its base, against whichthe curved surface C will rest when the pieces A, B, and C are screwedtogether. The mid` die piece B is furnished with a hollow part B,screw-cut internally, into which the connection of the air-pump will beadjusted when air is injected into the tire, the outside being gnarledto furnish a good catch for the iingers when screwing it into connectionwith part C, and is at the bottom furnished with a passage B2, admittingair to the tire and terminating either, as shown in Fig. 2, with asingle outlet B3 or, as shown in Fig. l, in two outlets B4 and B5.

The part B has a flange B, against which lies an air-tight disk B7, thathas, when piece C is screwed onto piece B', the inverted iiange C:sbearing against it. B is screw-cut, furthermore, on the part marked B8to match the corresponding internal screw cut part of piece C, (markedCT.) The third piece C is screw-cut on the part marked C2 to match theintern al thread in the cap A, and is hollowed out to inclose the middlepart B, so that the flexible air-tight disk BT is pressed against theoffset or inverted flange marked C8 in C and in the solid part markedC4, furnished with a passage C5, admitting' air into the tire. On theoutside O has protrusions C, furnished to retain the stem of the tire,and is secured there by having wire wound around it. There remains nowto be described the projection B9 on the middle piece B. This can beeither cylindrical or have two ilat surfaces, as shown in Figs. 9 andlO. As before stated, this projection contains the termination of thepassage B2, either with a single outlet or a double one, and my improvedsprings have been constructed so as to cover both cases.

The springF (shown in Fig. l) is furnished with a piece of ileXibleair-tight material on each of its prongs F and F2, conically shaped soas to fit into the equally conically-shaped hole or airoutlet, thusforming a regular valve and valve-seat. The spring in passing around theend of projection B is held there by fitting closely against the edgesof the groove, and can be secured there, furthermore, if necessary, by aslight overlapping of the edges of the groove, soldering, or like IOOmeans. IVhere the projection B9 only has one outlet, as in Fig. 2, thespring has only one piece of flexible air-tight material attached to theprong F covering this outlet, While the prong F2 is extended at Willeither the Whole length of projection B" or cut o. This constructionyields the strongest closing action as regards the valve, and the springcan in this ease be secured either by above -mentioned means in thegroove Gr or it can be secured in a side groove on the side ofprojection B9 opposite to Where the outlet and valve are. My secondspring device for closing these outlets is (as shown in Figs. 5 and 0,Where there are two outlets) by a curved spring II, lying around thecylindrical-shaped body of projection IS. As in the case of spring F,this curved spring II is furnished With a conical-shaped piece ofair-tight material, fitting into the conical-shaped holes terminatingthe outlet B"2 in projection B, and the spring is secured, prcferably,bya groove I, lying across the projection B9 between the two outlets, andcan be secured there in the same manner as spring F is secured in grooveG, by the overlapping of the edges oi groove or other suitable means.

In Figs. 7 and S I have shown the curved spring as applied to a singleoutlet, the spring lying coiled around the body of projection B9 as faras is deemed necessary, and the same quality is noticeable in the curvedspring for one outlet as in the straight spring for one outlet-that ofgreater strength and consequent tighter closing action.

I do not in either case limit myself to the conicalshaped outlet andcorresponding valve, as the piece ot flexible air-tight material may beflat and cover the outlet, as it ordinarily is, even more so, as theiiexible piece will in time conform itself to the aperture, and thus asa matter of fact insert itself gradually into the hole.

Vhat I then claim as new, and desire to secure by Letters Patent of theUnited States, 1s-

l. In a tire-valve, the combination with a valve-shell, of a stemfitting therein, provided with a longitudinal passage closed at one end,and a lateral passage communica-ting With said longitudinal passage andterminating at each end in the periphery of the stem, and a springfitted in a slot in the stem and having two arms parallel to the axis ofthe stem, and a valve secured to each of said arms in position to coverthe ends of the lateral passage, substantially as described.

2. In a tire-valve, the combination With a valve-shell, of a stem ttingtherein, provided With a longitudinal passage closed at one end, and alateral passage communicating With said longitudinal passage andterminating at one end in the periphery of the stein, and a springiitted in a slot in the stem and having tivo arms parallel to the axisof the stem, and a valve securedl to one of said arms in position tocover the end of the lateral passage, substantially as described.

In a tire-valve, the combination with a valveshell, of a stem fittingtherein provided With a longitudinal passage closed at one end and alateral passage communicating with said longitudinal passage andterminating' at each end in the periphery of the stein, and a springiitted in a slot situated at a right angle With the stem, and a valvesecured to each end of said spring in position to cover the ends of thelateral passage, substantially as described.

4. In a tire-valve, the combination with a valveshell, of a stem fittingtherein, provided With a longitudinal passage closed at one end and alateral passage communicating With said longitudinal passage and lcerminating at one end in the periphery of the stem, and a spring fitted ina slot situated at a right angle to the axis of the stem, and a valvesecured to said spring in position to cover the end of the lateralpassage, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand thisCth day of July, 1895.

IVILLIAM E. BRADNER.

lVitnesses:

AUG. M. TREsC-fnotv, AXEL HEEREN.

